Curling iron



FIG. 1 is a top plan view of a curling iron showing our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof; and

FIG. 6 is a cross-sectional view taken along the line VI--VI in FIG. 1. 

The ornamental design for a curling iron, as shown and described. 